Heavyweights Daniel Cormier and Roy “Big Country” Nelson will clash at UFC 166. If Cormier wins he would be in line for a title shot against the winner of the Velasquez-Dos Santos main event, but he says this will be his last fight at heavyweight before he drops down to the 205 pound light-heavyweight division.

This is only Cormier’s second fight in the UFC, but the Strikeforce Heavyweight Grand Prix winner is the UFC’s #2 contender. A big reason for the change in weight class is that he doesn’t want to fight American Kickboxing Academy teammate and friend Cain Velasquez. Any chance he changes his mind if Dos Santos upsets Velasquez?

The thought of Cormier cutting weight is a little concerning. He was at the 2008 Olympics in Beijing cutting weight to make the 211-pound weight limit in freestyle wrestling when his kidneys shut down. He missed the Olympics and wasn’t allowed to train for a year.